ANY ADVICE ON REMOVING INTAKE MANIFOLD TO ACCESS CRACKED COOLANT PIPE UNDER INTAKE MANIFOLD

2000 Daewoo Nubira, AUTOMATIC TRANSMISSION, 2.0 4 CYL, FWD MILEAGE 160,000.  I replaced the radiator and thermostat as radiator tank seam blew where a hairline crack was leaking so that was expected, as well as a pinhole leak in the resevoir tank which I replaced also. After the radiator and resevoir tank replaced the coolant plastic pipe under the intake manifold cracked where I may have had a very slow leak and crack, the engine was a junkyard replacement from approx 10 yrs ago so maybe the pipe was stressed in the engine replacement or just gave way due to age, heat. I have the aircleaner assembly off and a daewoo service manual and I think I can get the intake off to that I can replace that coolant pipe. Are there any tips for getting that intake off? I know I might have to disconnect where it connects to the muffler pipe or it may loosen where I can ease it back to get access to the coolant pipe located against the rear of the 4 cyl engine on the firewall side of the engine. any tips appreciated, I may end up getting all the part together, including any hoses I can get access to and let a mechanic do this but I think its worth trying since I recently put the radiator in. I replaced the same radiator maybe 6 or 7 yrs ago and no signs of head gasket problems which I suspected since my coolant system blew three times recently(1-the radiator tank where cracked, 2-the coolant resevoir-pinhle leak, 3-plastic coolant pipe under the intake) Thank you any tips appreciated. I could junk the car and buy a toyota but I am retired and have the time to work on it, like the car, and the taxes are very low on it